The toon can be harvested three times a year. Toon tree grows fast, ordinary toon tree grows to about 20 centimeters can be picked. When picking, pay attention to leave a few leaves under the toon buds to make the toon tree germinate faster. Toon is a perennial deciduous tree, more than 10 meters high. The leaves are alternate, the number of pinnately compound leaves is even, the leaflets are 6-10 pairs, the leaf scar is large, 40 centimeters long, 24 centimeters wide, the leaflets are long elliptic, the tip of the leaf is pointed, 10-12 centimeters long, 4 centimeters wide, the young leaves are purple-red, the adult leaves are green, the back of the reddish-brown, slightly glutinous, slightly astringent, and the petiole is red. Panicles terminal, pendulous, bisexual, white, aromatic, small, campanulate, 5-loculed ovary, 3 ovules per locule.

Styles shorter than ovary, fruity, narrowly ellipsoid or subellipsoid, ca. 2 cm, reddish-brown when ripe, fruits leathery, cleft into a bell shape. blooms in June, ripening in October-November. It is oval, with long woody wings, small seeds, low germination rate, high oil content and edible. Around March each year, when spring flowers bloom, is the best time to soak parsnip seeds. Soak the seeds in warm water at 35-40 degrees for about 24 hours, then remove and place in a wet cloth bag at a constant temperature to accelerate germination. The temperature should be kept at about 20-25 degrees and watered twice a day. Each time you water, the wet cloth bag should be turned over once, the seed should be 50%, toon seeds can be mixed with river sand at a ratio of 1: 2, and add a certain amount of water. How to master the amount of water and the amount of water is less, use your hand to grab a handful of river sand mixed with seeds, pinch your fingers tightly, and then open your fingers. The river sand mixed with seeds will naturally disperse.

The nitrite content in the toon will increase as the toon continues to grow, so it is generally not recommended to continue using older toons. The nitrite content in older toons has exceeded the amount that the human body can normally tolerate, and consumption will have some impact on human health, so care needs to be taken when harvesting toons in general. Dried parsnips are similar to old parsnips in that they contain a certain amount of nitrite, which will have certain adverse effects on human health after consumption. Therefore, after soaking the dried parsnips, remember to blanch them in boiling water, so as not to cause the residual nitrite in the parsnips to be completely removed.